Double air-fuel ratio sensor system having double-skip function

Details Double air-fuel ratio sensor system having double-skip function Double air-fuel ratio sensor system having double-skip function

1986-02-19

1988-01-26

Dolinar, Andrew M.

Power plants

Internal combustion engine with treatment or handling of...

Methods

60276, 60285, 123489, F02D 4114

Patent

active

047209739

ABSTRACT:
In a double air-fuel sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust gas passage, an air-fuel ratio correction amount is calculated in accordance with the output of the upstream-side air-fuel ratio sensor, and the actual air-fuel ratio is adjusted in accordance with the calculated air-fuel ratio correction amount and the output of the downstream-side air-fuel ratio sensor. When the output of the upstream-side air-fuel ratio sensor is switched from the rich side to the lean side, or vice versa, the air-fuel ratio correction amount is shifted remarkably by a first skip amount for a predetermined time period, and after this period, the air-fuel ratio correction amount is shifted conventionally by a second skip amount which is smaller than the first skip amount.

REFERENCES:
patent: 3939654 (1976-02-01), Creps
patent: 4027477 (1977-06-01), Storey
patent: 4130095 (1978-12-01), Bowler et al.
patent: 4163433 (1979-08-01), Fujishiro
patent: 4235204 (1980-11-01), Rice
patent: 4251989 (1981-02-01), Norimatsu et al.
patent: 4475517 (1984-10-01), Kobayashi et al.
patent: 4539958 (1985-09-01), Ito et al.
patent: 4561400 (1985-12-01), Hattori
patent: 4571683 (1986-02-01), Kobayashi et al.
patent: 4603670 (1986-08-01), Bertsch et al.

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